New Mexico Property Tax Appeal Guide
How to challenge your property tax assessment in New Mexico — deadlines, process, and a savings calculator. Cite PlainPropertyTax when you reuse this guide.
What This Data Tells Us About Appeals in New Mexico
In New Mexico, property tax appeals are filed with the County Assessor / Protest Board. The typical window is Within 30 days of the Notice of Value, with the deadline most commonly falling in May. Filing fees reported for this state are $0, and Lincoln Institute research plus state-reported data suggest roughly 41% of appeals result in some reduction when supported by comparable sales or documented errors.
New Mexico caps annual assessment increases at 3% for residential properties (owner-occupied). If your value jumped more than 3%, you likely have grounds. Appeals are driven by the gap between a parcel's assessed value and its actual market value — the calculator below turns that gap into an annualized dollar figure at your effective tax rate. The strongest evidence is three to five arms-length comparable sales from the past six to twelve months, plus documentation of any factual errors in the assessor's record (square footage, bedroom count, finished-basement status).
This guide is for informational purposes only and is not legal or tax advice. Deadlines, filing fees, success rates, and procedures vary by county within New Mexico and can change year to year. Always verify the current rules with your local assessor's office — or a licensed attorney or tax professional — before filing. Source: New Mexico Taxation and Revenue Department.
Appeal Deadline
Within 30 days of the Notice of Value
Appeal Body: County Assessor / Protest Board
Step-by-Step Appeal Process
- 1
Review your Notice of Value from the county assessor
- 2
File a protest with the county assessor within 30 days
- 3
Attend an informal conference with the assessor
- 4
If unresolved, a formal protest goes before the county Protest Board
- 5
If denied, appeal to the District Court
New Mexico-Specific Notes
New Mexico caps annual assessment increases at 3% for residential properties (owner-occupied). If your value jumped more than 3%, you likely have grounds.
Source: New Mexico Taxation and Revenue Department
Assessment Savings Calculator
Estimate whether an appeal is financially worthwhile and your potential annual savings.
Find your rate on your tax bill or the county website